CN203670229U

CN203670229U - Magnetic drive pump resistant to corrosion and dry grinding

Info

Publication number: CN203670229U
Application number: CN201420021923.0U
Authority: CN
Inventors: 高涵文; 高来生
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-01-14
Filing date: 2014-01-14
Publication date: 2014-06-25
Anticipated expiration: 2024-01-14

Abstract

The utility model relates to a magnetic drive pump resistant to corrosion and dry grinding. An external worm body wall 1 and an impeller 2 which are adopted for the magnetic drive pump are matched with each other and installed through a first radial roller bearing 9 and a first axial ball bearing 8, an internal worm body wall 3 and a pump shaft 7 are matched with each other and installed through a second radial roller bearing 11, and the impeller 2 and the second radial roller bearing 11 are matched with each other and installed through a second axial ball bearing 10. Thus, vibration and noise caused by poor dynamic balance of the impeller 2 can be reduced, axial movement of the pump shaft 7 and the impeller 2 is effectively avoided, heat caused by friction is greatly reduced, idling can be ensured within a certain time period under the condition that pumped liquid is lost and cut off, the dry grinding resistance of the magnetic drive pump is enhanced, and running safety of the magnetic drive pump is improved; the pump shaft 7, the impeller 2, the first radial roller bearing 9, the second radial roller bearing 11, the first axial ball bearing 8 and the second axial ball bearing 10 in a pump cavity are all made of anti-corrosion materials, and therefore corrosion resistance of the magnetic drive pump is improved.

Description

A kind of magnetic drive pump of corrosion-resistant anti-dry grinding

Technical field

The utility model relates to the magnetic drive pump of a kind of magnetic drive pump, particularly a kind of corrosion-resistant anti-dry grinding.

Background technique

Magnetic drive pump is different from traditional canned pump, motor crankshaft is not directly connected with pump shaft, but motor crankshaft drives the rotation of outer magnet rotor, and outer magnet rotor coordinates with interior magnet rotor by magnetic force and drives interior magnet rotor rotation, drive pump shaft to rotate by interior magnet rotor, make the vane rotor rotation work on pump shaft.In magnetic drive pump, between magnet rotor and outer magnet rotor, be provided with the Seal cage that separation sleeve forms, pump shaft and interior magnet rotor are enclosed in Seal cage, one can avoid liquid by pump shaft end to outside seepage, two can carry out cooling to pump shaft and interior magnet rotor, therefore very excellent in leakage characteristics without take traditional dynamic seal (packing) just can obtain to pump shaft, thereby be widely used in carrying various severe toxicity, the danger medium such as inflammable, explosive, bring into play important function in fields such as oil, chemical industry, medicine, nuclear power, national defence.Because the sliding bearing of magnetic drive pump inner support pump shaft is to utilize institute's course of conveying fluid to be lubricated, this process-liquid often lubricity is poor; Secondly in production environment, often can run in pump that liquid is evacuated or the situation such as liquid minimizing, can produce " no load running ", be commonly called as " dry grinding ", and " dry grinding " can make sliding bearing fast heating at short notice, and and pump shaft between wearing and tearing acceleration; In addition the solid being dispersed in working fluid, can produce potential bearing or the grinding of journal surface.The build-up effect of these times can cause bearing to wear and tear too early, and result causes pump shaft substantial deviation rotating center, and interior magnet rotor and separation sleeve rub, and separation sleeve is worn out and generation is high hot rapidly, cause dielectric leakage, the poisonous inflammable and explosive material diffusion that waits, even causes major disaster accident.

Impeller is because material is inhomogeneous, the accumulation of blank defect, machining error, assembly error etc., and when design the asymmetry geometrical shape that exists etc., make its non-uniform mass, form certain bias, in the time of vane rotary, produce unbalanced centrifugal inertia force, thereby make pump produce vibration and noise, dynamic balancing bad can reduction the expected service life of equipment, show especially the earlier period damage of bearing, the maintenance period of shortening equipment, the maintenance cost of increase equipment, affects quality of product, aggravating working environment etc.

Summary of the invention

The problem that is difficult to overcome in order to solve above-mentioned prior art, the utility model provides a kind of magnetic drive pump of corrosion-resistant anti-dry grinding, comprise pump shaft 7, impeller 2, interior magnet rotor 5, outer magnet rotor 6, separation sleeve 4, interior snail body wall 3, outer snail body wall 1, the first radial roller bearing 9, the second radial roller bearing 11, the first axial ball bearing 8 and the second axial ball bearing 10, interior magnet rotor 5 is fixedly mounted on pump shaft 7 axle heads, outer magnet rotor 6 is arranged on motor shaft end, between interior magnet rotor 5 and outer magnet rotor 6, separation sleeve 4 is set, separation sleeve 4 is fixedly connected with interior snail body wall 3 body seals, between outer snail body wall 1 and impeller 2, coordinate installation by the first radial roller bearing 9 and the first axial ball bearing 8, between interior snail body wall 3 and pump shaft 7, coordinate installation by the second radial roller bearing 11, between impeller 2 and the second radial roller bearing 11, coordinate the second axial ball bearing 10 to install.

As further improvement of the utility model, described pump shaft 7 is made one with impeller 2, and pump shaft 7 is stainless steel material with the material that impeller 2 is selected.

As further improvement of the utility model, described the first radial roller bearing 9 and the second radial roller bearing 11 comprise roller 14, slider 15, bearing inner race 16, bearing outer ring 17, inner shield ring 13 and outer back-up ring 12, between bearing inner race 16 and bearing outer ring 17, place roller 14, between roller 14, separate by slider 15, roller 14, the material that bearing inner race 16 and bearing outer ring 17 are selected is gas Pressure Sintered Silicon Nitride, slider 15 the selection of materials are silicon carbide, silicon nitride, one in zirconium oxide and ptfe composite, the material that inner shield ring 13 and outer back-up ring 12 are selected is silicon nitride.

As further improvement of the utility model, the described first axial ball bearing 8 and the second axial ball bearing 10 comprise annular retainer 18, ball 20, thrust washer 19, annular retainer 18 the selection of materials are the one in silicon carbide, silicon nitride, zirconium oxide and ptfe composite, thrust washer 19 the selection of materials are the one of silicon carbide, silicon nitride and air pressure silicon nitride sintered material, and ball 20 the selection of materials are gas Pressure Sintered Silicon Nitride.

The beneficial effects of the utility model are: this structure magnetic drive pump pump shaft 7, impeller 2 and outer snail body wall 1, between interior snail body wall 3, pass through the first radial roller bearing 9, the second radial roller bearing 11, the first axial ball bearing 8, the second axial ball bearing 10 coordinates to be installed, can reduce the bad vibration causing of impeller 2 dynamic balancing and noise, effectively stop the axial float of pump shaft 7 and impeller 2, greatly reduce the heat that friction generates, can be within a certain period of time no load running in the case of the disappearance of pumping liquid and cutout, strengthen the anti-dry grinding performance of magnetic drive pump, improve the security of operation of magnetic drive pump, pump shaft 7 in pump chamber, impeller 2, the first radial roller bearing 9, the second radial roller bearing 11, what the first axial ball bearing 8 and the second axial ball bearing 10 were selected is all resistant material, improve the decay resistance of magnetic drive pump.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention

Fig. 2 is the structural representation of radial roller bearing

Fig. 3 is the structural representation of axial ball bearing

Embodiment

Embodiment: a kind of corrosion-resistant, the magnetic drive pump of anti-dry grinding, comprise pump shaft 7, impeller 2, interior magnet rotor 5, outer magnet rotor 6, separation sleeve 4, interior snail body wall 3, outer snail body wall 1, the first radial roller bearing 9, the second radial roller bearing 11, the first axial ball bearing 8 and the second axial ball bearing 10, interior magnet rotor 5 is fixedly mounted on pump shaft 7 axle heads, outer magnet rotor 6 is arranged on motor shaft end, between interior magnet rotor 5 and outer magnet rotor 6, separation sleeve 4 is set, separation sleeve 4 is fixedly connected with interior snail body wall 3 body seals, between outer snail body wall 1 and interior snail body wall 3, be fastenedly connected, outer snail body wall 1, interior snail body wall 3 and separation sleeve 4 sealings form pump chamber.When magnetic drive pump work, drive outer magnet rotor 6 to rotate by external motivating force, outer magnet rotor 6 and interior magnet rotor 5 coordinate by magnetic force drive in magnet rotor 5 rotate, interior magnet rotor 5 drives pump shaft 7 to rotate, described magnetic drive pump pump shaft 7 is made one with impeller 2, impeller 2 is along with together rotary work of pump shaft 7, and pump shaft 7 and impeller 2 are all selected stainless steel material, and pump shaft 7 and impeller 2 that this kind of material made have the obdurability in corrosion resistance, moldability, compatibility and wide range.

Between the outer snail body wall 1 of described magnetic drive pump and impeller 2, coordinate installation by the first radial roller bearing 9 and the first axial ball bearing 8, between interior snail body wall 3 and pump shaft 7, coordinate installation by the second radial roller bearing 11, between impeller 2 and the second radial roller bearing 11, coordinate the second axial ball bearing 10 to install, this kind coordinates to be installed, can reduce vibration and the noise of the bad generation of impeller 2 dynamic balancing, can effectively stop the axial float of pump shaft 7 and impeller 2, improve the security of operation of magnetic drive pump.Described the first radial roller bearing 9 and the second radial roller bearing 11 comprise roller 14, slider 15, bearing inner race 16, bearing outer ring 17, inner shield ring 13 and outer back-up ring 12, between bearing inner race 16 and bearing outer ring 17, place roller 14, between roller 14, separate by slider 15, described slider 15 has been avoided the friction between roller 14, greatly reduce surface friction drag, reduce friction producing heat, can be within a certain period of time no load running in the case of the disappearance of pumping liquid and cutout, strengthen the anti-dry grinding performance of magnetic drive pump, the dense degree that roller 14 is placed can regulate according to load by slider 15, retainer structure compared with available technology adopting is more flexible, practical, slider 15 the selection of materials are silicon carbide, silicon nitride, one in zirconium oxide and ptfe composite, the material that inner shield ring 13 and outer back-up ring 12 are selected is silicon nitride, roller 14, bearing inner race 16 and bearing outer ring 17 are all selected gas Pressure Sintered Silicon Nitride material, the radial roller bearing that described material is made, wear-resisting, corrosion resistant performance is good, the more important thing is its cold-hot impact, self lubricity and comprehensive mechanical performance are good especially, not fragile, long service life.The described first axial ball bearing 8 and the second axial ball bearing 10 comprise annular retainer 18, ball 20, thrust washer 19, described annular retainer 18 the selection of materials are silicon carbide, silicon nitride, one in zirconium oxide and ptfe composite, thrust washer 19 the selection of materials are silicon carbide, the one of silicon nitride and air pressure silicon nitride sintered material, ball 20 the selection of materials are gas Pressure Sintered Silicon Nitride, the axial ball bearing corrosion resistant that described material is made, wear-resisting property is good, the more important thing is its cold-hot impact, self lubricity and comprehensive mechanical performance are good especially, not fragile, long service life.

Above-described embodiment is only explanation technical conceive of the present utility model and feature; its object is to allow person skilled in the art can understand content of the present invention and be implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed in protection domain of the present utility model.

Claims

1. the magnetic drive pump of a corrosion-resistant anti-dry grinding, comprise pump shaft 7, impeller 2, interior magnet rotor 5, outer magnet rotor 6, separation sleeve 4, interior snail body wall 3, outer snail body wall 1, the first radial roller bearing 9, the second radial roller bearing 11, the first axial ball bearing 8 and the second axial ball bearing 10, interior magnet rotor 5 is fixedly mounted on pump shaft 7 axle heads, outer magnet rotor 6 is arranged on motor shaft end, between interior magnet rotor 5 and outer magnet rotor 6, separation sleeve 4 is set, separation sleeve 4 is fixedly connected with interior snail body wall 3 body seals, between outer snail body wall 1 and impeller 2, coordinate installation by the first radial roller bearing 9 and the first axial ball bearing 8, between interior snail body wall 3 and pump shaft 7, coordinate installation by the second radial roller bearing 11, between impeller 2 and the second radial roller bearing 11, coordinate the second axial ball bearing 10 to install.

2. magnetic drive pump according to claim 1, is characterized in that: described pump shaft 7 is made one with impeller 2, and pump shaft 7 is stainless steel material with the material that impeller 2 is selected.

3. magnetic drive pump according to claim 1, it is characterized in that: described the first radial roller bearing 9 and the second radial roller bearing 11 comprise roller 14, slider 15, bearing inner race 16, bearing outer ring 17, inner shield ring 13 and outer back-up ring 12, between bearing inner race 16 and bearing outer ring 17, place roller 14, between roller 14, separate by slider 15, roller 14, the material that bearing inner race 16 and bearing outer ring 17 are selected is gas Pressure Sintered Silicon Nitride, slider 15 the selection of materials are silicon carbide, silicon nitride, one in zirconium oxide and ptfe composite, the material that inner shield ring 13 and outer back-up ring 12 are selected is silicon nitride.

4. magnetic drive pump according to claim 1, it is characterized in that: the described first axial ball bearing 8 and the second axial ball bearing 10 comprise annular retainer 18, ball 20, thrust washer 19, annular retainer 18 the selection of materials are the one in silicon carbide, silicon nitride, zirconium oxide and ptfe composite, thrust washer 19 the selection of materials are the one of silicon carbide, silicon nitride and air pressure silicon nitride sintered material, and ball 20 the selection of materials are gas Pressure Sintered Silicon Nitride.